ANESTHETIC DISPENSING DEVICE

摘要

An anesthetic dispensing device (1), to which a carrier gas stream is fed for enriching with anesthetic, has the gas stream split into two partial gas streams, one of which flows through a bypass channel (7) unchanged and the other of which is fed to an evaporation chamber (9), where the partial gas stream is saturated with anesthetic. In a mixing point (6), both partial gas streams are mixed to form an anesthetic gas stream, which leaves the anesthetic dispensing device through the anesthetic gas outlet (4). A control unit (2) is provided that is configured to generate a control signal for an electric motor drive (14) for adjusting the valve opening of the valve element (15) on the basis of a concentration of the anesthetic in the anesthetic gas needed at the anesthetic gas outlet (4) and at least one temperature-specific correction factor.

主权项

1. An anesthetic dispensing device comprising:
a carrier gas inlet; a bypass channel; a dispensing channel arranged parallel to the bypass channel with respect to fluid flow; an anesthetic gas outlet connected to the carrier gas inlet via the bypass channel and via the dispensing channel; an evaporation chamber providing an anesthetic, the evaporation chamber being supplied from the dispensing channel with a gas, which is enriched with an anesthetic in the evaporation chamber, such that gas enriched with anesthetic flows from the evaporation chamber to a mixing point, in which the gas enriched with anesthetic is mixed with gas coming from the bypass channel to form anesthetic gas, which flows to the anesthetic gas outlet; a valve element having a valve opening which is changed to vary a volume flow of gas to be enriched with anesthetic that is flowing through the evaporation chamber; an electric motor drive for adjusting the valve opening of the valve element; and a control unit generating a control signal for controlling the electric motor drive on the basis of a concentration of the anesthetic in the anesthetic gas needed at the anesthetic gas outlet and at least one temperature-specific correction factor.